Question

A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27

The actual distribution for a class of 20 is in table 11.28

State the null and alternative hypothesis

Short answer

$H_0:$The observed and expected test scores are identical.

$H_{\alpha }:$Actual test results differ from expected test results.

Step-by-step solution

Given Information 

Given tables are

We have to state the null and alternative hypothesis.

Explanation 

The null hypothesis is as follows:

$H_0:$The observed and expected test scores are identical.

The alternate hypothesis is as follows:

$H_{\alpha }:$Actual test results differ from expected test results.